at MK, I have taken both the monorail and the boat to parking. depending on time of day, crowds, I have found boat a little easier than monorail. it is a pain to stop and start on the ramp up to monorail. they have a ramp that they put up to monorail car to roll scooter on with. can not remember if you have to back off or not, seems like there was one stop where you did have to back off. i know someone will correct if I am wrong. the big boat from TTC, you just roll on, find a spot near one of the few benches on lower level for others to sit and roll off after arriving at MK. you can easily take scooter through bag check line and at the turnstyle, just stay with rest of party when you get to front of line they will open the gate and let you thru. that part is the same at each park. hardest part of that came year one grandson became upset when he could not go thru with me even being right beside me. got him over it very quick when he was told get in stroller and let little brother walk in. yeah the joys of going with grandkids. have a great trip, you are headed in the right direction with your planning